gaillette

From the Walloon word 'gaille' (walnut) and the diminutive suffix '-ette'; the coal presents itself in pieces the size of a walnut. 'Gaille' is derived from the Latin '(nux) gallica' ('Gaulish (nut)'), related to the Old French 'nois gauge', the walnut tree being of very ancient implantation in Gaul, see 'walnut' in English, 'Walnuss' in German.